A novel approach in Steganography combining random key and substitution cipher
B. Ramaswamy Karthikeyan, V. Abbinaiya, T. Sumathi · 2019
The technique of secure transmission of confidential information over a network by hiding the message inside multimedia is termed steganography. Contrary to cryptography where the data is encrypted using a key using various methods and algorithms and then transmitted over the channel, in steganography, the message is concealed such that there is no trace of information being transmitted. The combined use of cryptography and steganography, increase the level of security of the data being transmitted. They act as the viable method to transmit information over non-secure channels. After concealing the secret message in the carrier multimedia, it is then analyzed using various metrics such as MSE and PSNR to determine the quality of the steganographic image.